In which sentence 'up' is used as an adverb?

Adverb
Up-in or into a higher position or level/from below the horizon/ upward from the ground or surface
- The land rises up from the valley.
- She stood beneath the window and called up to her friend.
- Please pick your clothes up off the floor.
- We watched the sun come up.
Preposition:
Up- used as a function word to indicate motion to or toward or situation at a higher point of/in a direction regarded as being toward or near the upper end or part of
- She had to walk her bike up the hill
- He climbed up the ladder.
- We walked up the street to meet them.
Adjective:
up- risen above the horizon/being in a raised position
-The candy is up on the top shelf.
- The window is already up.
- Your package is up at the front desk.
- We were up near the stage


[Source: Merriam-Webste Dictionary]